Naitanui, fresh from kicking a match-winning goal after the siren against North Melbourne, delivered with a dazzling display of tap work around the ground.

The 23-year-old tallied 31 hitouts, eight more than GWS managed as a team, as he jumped all over counterpart Jonathan Giles.

Naitanui also chipped in with eight tackles and two goals, including a spectacular snap in the second quarter, as the visitors strolled to a 23.17 (155) to 8.7 (55) victory that lifted them into the top eight.

Naitanui's ruck work created goals, clearances and no shortage of brilliant service to Eagles midfielders Chris Masten, Luke Shuey, Daniel Kerr and Matt Priddis - who had a combined tally of 114 possessions.

Six-time All Australian ruckman Dean Cox (21 touches, 24 hitouts) was also outstanding while the hosts missed veteran Dean Brogan, a late withdrawal due to back spasms.

Late inclusion Setanta O'hAiplin tried to help Giles in the ruck, but Naitanui danced around him with ease and the Irishman was substituted out at halftime.

The Eagles had essentially pocketed the four premiership points at the major break, with a 66-point lead the result of their highest-scoring first half since the corresponding fixture last year.

The absence of GWS key defender Phil Davis was again glaring, with key forwards Josh Kennedy and Jack Darling kicking five goals each for West Coast.

The Eagles' only sour note was an accidental head knock for on-baller Bradd Dalziell, who was substituted out of the game early with concussion.

The Giants turned the ball over far too often, especially in defence, and struggled to apply the necessary pressure as the visitors moved the ball from end to end with ease.

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